You're right, we as human beings have many innate things: emotions and impulses, but we also have and can use reason, that is the most powerful weapon, our intelligence, obviously since this is related to money, we must take care of it, there is no need to spend it all, or go crazy at the casino, we have to have very good options to master that part, in fact I am one of those who has always said that by controlling money, emotions are automatically controlled.
I feel I can actuyagree with you on this one.
While emotions and impulse are inevitably part of human characteristics doesn't mean we can't learn how to master and control them when it comes to decision making, especially when it has to do with one's finances. This is because decisions make due to emotional outburst or impulsive behaviour could result to losses of one's finance because that's a very unstable state of mind and a very bad state for someone to make financial decisions.
And I also think your assertion regarding a person who's able to control money automatically being able to control is emotions, I find this to be true because the reason most people start feeling so emotional is mostly due to their finances or future of their investment. What I mean is that, when a gambler is currently making profits in gambling, he more currently view this as an opportunity to increase or multiply his wealth by making even more wins, which may automatically result to a change in emotions and approach, same with when a gambler is losing repeatedly, this may also affevt his logical thinking, replacing it with emotions, he may end up seeing a possibility of him winning back his money, so this results to him making some emotiinal and impulsive decisions, just so he could recover the money he lost to the casino.